DE4104359C2 - - Google Patents

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Publication number
DE4104359C2
DE4104359C2 DE4104359A DE4104359A DE4104359C2 DE 4104359 C2 DE4104359 C2 DE 4104359C2 DE 4104359 A DE4104359 A DE 4104359A DE 4104359 A DE4104359 A DE 4104359A DE 4104359 C2 DE4104359 C2 DE 4104359C2
Authority
DE
Germany
Prior art keywords
charging system
characterized
coil
implantable
hearing aid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE4104359A
Other languages
German (de)
Other versions
DE4104359A1 (en
Inventor
Joachim Dipl.-Ing. 8000 Muenchen De Baumann
Guenter 7449 Neckartenzlingen De Hortmann
Hans Dr.-Ing. 8028 Taufkirchen De Leysieffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IMPLEX AG HEARING TECHNOLOGY, 85737 ISMANING, DE
Original Assignee
Implex 7449 Neckartenzlingen De GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Implex 7449 Neckartenzlingen De GmbH filed Critical Implex 7449 Neckartenzlingen De GmbH
Priority to DE4104359A priority Critical patent/DE4104359C2/de
Publication of DE4104359A1 publication Critical patent/DE4104359A1/en
Application granted granted Critical
Publication of DE4104359C2 publication Critical patent/DE4104359C2/de
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/022Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter
    • H02J7/025Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter using non-contact coupling, e.g. inductive, capacitive
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception
    • H04R25/55Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using T-coils
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception
    • H04R25/75Electric tinnitus maskers providing an auditory perception
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/31Aspects of the use of accumulators in hearing aids, e.g. rechargeable batteries or fuel cells
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/67Implantable hearing aids or parts thereof not covered by H04R25/606
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception
    • H04R25/30Monitoring or testing of hearing aids, e.g. functioning, settings, battery power
    • H04R25/305Self-monitoring or self-testing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception
    • H04R25/60Mounting or interconnection of hearing aid parts, e.g. inside tips or housing. to ossicles
    • H04R25/604Arrangements for mounting transducers
    • H04R25/606Arrangements for mounting transducers acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window

Description

Die Erfindung betrifft ein Ladesystem für implantierbare Hörhilfen und Tinnitus-Mas kierer mit einer mehrfach wiederaufladbaren Gleichspannungsquelle. The invention relates to a charging system for implantable hearing aids and tinnitus Mas Kierer with multiple rechargeable DC voltage source.

Es sind beispielsweise aus der DE-OS 19 40 803 oder der US-PS 41 34 408 Ladesysteme für die Batterien von Herzschrittmachern bekannt. There are 41 34408 charging systems for the batteries of pacemakers known for example from DE-OS 19 40 803 or US-PS. Das in diesen Systemen zur indukti ven Energieübertragung genutzte Verfahren beruht auf zwei gekoppelten Spulen, ähn lich einem Übertrager, wobei die eine Spule implantiert ist und die andere Spule extern in die Nähe der implantierten Spule gebracht werden kann. The water used in these systems for inductive energy transfer ven method is based on two coupled coils similarity Lich a transformer wherein one coil is implanted and the other coil may be placed externally to the vicinity of the implanted coil. Die implantierte Spule speist direkt und somit breitbandig eine Gleichrichterschaltung. The implanted coil feeds a rectifier circuit directly and therefore broadband. Diese Art der Ener gieübertragung erlaubt wegen der schlechten Spulenkopplung nur relativ geringe La deströme für die Batterie. This type of Ener gieübertragung allowed because of poor coil coupling only relatively small La deströme for the battery. Diese waren für die Batterien von Herzschrittmachern ausrei chend, da für den Betrieb eines Herzschrittmachers nur wenig Energie vonnöten ist und man daher mit geringen Batteriekapazitäten auskommt. These were sufficient to justify the batteries of pacemakers, as for the operation of a pacemaker little energy is needed and it therefore makes do with low battery capacity. Im Gegensatz dazu hat der Be trieb einer Hörhilfe oder eines Tinnitus-Maskierers einen deutlich höheren Energiebe darf, da diese Geräte permanent aktiv sind. In contrast, the Be has drifted a hearing aid or tinnitus masker a significantly higher Energiebe allowed, since these devices are permanently active.

Ein implantierbares Hörgerät mit mehrfach wiederaufladbarer Gleichspannungsquelle ist aus der DE 39 18 086 C1 bekannt. An implantable hearing aid with multiple rechargeable DC power source is known from DE 39 18 086 C1. Das Ladesystem für die Gleichspannungsquelle ist dort aber nicht erläutert. The charging system for the DC voltage source is there but not explained.

Der Erfindung liegt die Aufgabe zugrunde, ein Ladesystem für die Batterien von im plantierten Hörhilfen zu schaffen, das die notwendigen Ladeströme zuverlässig zur Verfügung stellt. The invention has for its object to provide a charging system for the batteries of in-implanted hearing aids, which provides the necessary charging currents reliably.

Diese Aufgabe wird erfindungsgemäß mit einem Ladesystem der eingangs genannten Art gelöst, das einen implantierbaren Eingangsresonanzkreis als Stromquelle für die zu ladende Gleichspannungsquelle und einen außen am Körper anordbaren Sendereso nanzkreis aufweist, der mit dem Empfangsresonanzkreis zur Energieübertragung vom Körperäußeren ins Körperinnere induktiv koppelbar ist. This object is inventively achieved by a charging system of the type mentioned at the outside can be arranged on the body Sendereso nanzkreis comprises an implantable input resonant circuit as a power source for the to be loaded DC voltage source and one which is inductively couplable to the receiving resonant circuit to transfer energy from the body exterior to the interior of the body.

Durch die Resonanzkopplung der Spulen des Senderesonanzkreises und des Empfangs resonanzkreises ist eine im Vergleich zu einer Breitbandkopplung wesentlich verbes serte Energieübertragung möglich, so daß die notwendigen Ladeströme für die Batte riekapazitäten einer Hörhilfe bzw. eines Tinnitus-Maskierers zur Verfügung stehen. Through the resonant coupling of the coil of the transmitting resonant circuit and the reception of the resonance circuit a much verbes compared to a broadband coupling serte energy transmission is possible, so that the required charging currents for the Batte riekapazitäten a hearing aid or a tinnitus masker are available.

Die Sendespule des Senderesonanzkreises kann dabei zur Energieübertragung durch die geschlossene Haut (transkutan) vom Körperäußeren ins Körperinnere mit der Empfangsspule des implantierbaren Empfangsresonanzkreises konzentrisch in Deckung bringbar sein. The transmitting coil of the transmitting resonant circuit can thereby be brought to transfer energy through the closed skin (transcutaneous) from the body exterior to the interior of the body with the receiving coil of the implantable receiving resonant circuit concentrically cover. Vorteilhafterweise ist im implantierbaren Teil des Ladesystems eine Te lemetrieschaltung zur Gewinnung von Information über die relative Position der Sen despule zur Empfangsspule und/oder über den Ladezustand der Gleichspannungsquelle vorgesehen. Advantageously, in the implantable part of the charging system, a Te lemetrieschaltung for obtaining information about the relative position of the Sen despule provided to the receiving coil and / or the charge state of the DC voltage source. Nach einer weiteren Ausgestaltung der Erfindung kann die Empfangsspule einen über die Spule überstehenden Ferritkern aufweisen, dessen überstehendes Ende zur magnetischen und mechanischen Kopplung mit der Sendespule durch die Haut nach außen hindurchführbar ist. According to a further embodiment of the invention, the receiver coil may have a projecting beyond the ferrite core coil, its protruding end to the magnetic and mechanical coupling to the transmitting coil through the skin can be guided to the outside. Es besteht also die Wahl zwischen einem nach außen über haupt nicht in Erscheinung tretenden implantierbaren Energieversorgungsteil und ei nem in der Energieübertragung noch leistungsfähigeren Ladesystem mit nach außen tre tendem Ferritkern als Kopplungselement zwischen Sende- und Empfangsspule. So there is a choice between an outwardly not-emergent implantable power supply portion and ei nem in power transmission even more efficient charging system with tre outwards tendem ferrite core as a coupling element between transmitting and receiving coils.

Der Empfangsresonanzkreis, eine Ladeelektronik sowie die Gleichspannungsquelle können zusammen mit der Hörhilfe oder dem Tinnitus-Maskierer in einem gemeinsa men Gehäuse untergebracht sein. The receiving resonant circuit, charging electronics as well as the DC power source may be housed together with the hearing aid or tinnitus masker in the Common men housing. Da die derzeit für Hörhilfen insbesondere in Frage kommenden Nickel-Cadmium-Akkumulatoren in Knopfzellenbauweise jedoch nur eine durchschnittliche Lebensdauer von fünf Jahren aufweisen, kann die Gleichspan nungsquelle zweckmäßigerweise statt dessen auch in einem separaten Gehäuse unterge bracht und mit der Hörhilfe bzw. dem Tinnitus-Maskierer lösbar galvanisch verbunden sein. Since the moment, however, have for hearing aids in particular candidate nickel-cadmium batteries in button cell design only an average life of five years, the same chip can voltage source expediently instead in a separate housing underweight body forward with the hearing aid or tinnitus masker be removably electrically connected. Dadurch kann beim Batteriewechsel ein Austausch des gesamten Systems vermie den werden. This can be vermie the case of battery replacement, replacement of the entire system.

Die implantierbare Energieversorgung ist vorteilhafterweise mit der Hörhilfe bzw. dem Tinnitus-Maskierer lösbar, galvanisch getrennt und induktiv verbunden, wobei zur in duktiven Kopplung zwei Koppelspulen vorgesehen sein können, deren Über setzungsverhältnis so gewählt ist, daß die Betriebsspannung für die Hörhilfe bzw. den Tinnitus-Maskierer die Spannung der Gleichspannungsquelle übersteigt. The implantable energy supply is advantageously releasably connected to the hearing aid or tinnitus masker, electrically isolated and inductively, wherein the two coupling coils can be provided in inductive coupling, the over is reduction ratio selected such that the operating voltage for the hearing aid or tinnitus -Maskierer exceeds the voltage of the DC voltage source. Der Vorteil dieser Ausgestaltung besteht darin, daß es keine galvanische Verbindung zwischen der Gleichspannungsquelle und der Hörhilfe gibt, deren Kontaktflächen gegen das Eindrin gen von Körperflüssigkeit abgedichtet werden müßten. The advantage of this configuration is that there is no electrical connection between the DC voltage source and the hearing aid, the contact surfaces should be sealed from the penetration of body fluid.

Das Gehäuse der Energieversorgung kann zur Implantation im Kopfbereich des Pa tienten, vorzugsweise im Mastoid, ausgelegt sein. The housing of the power supply can tienten for implantation in the head region of the Pa, preferably in the mastoid, is designed.

Vorteilhaft ist auch die Anordnung einer Warneinrichtung im implantierbaren Teil des Ladesystems, die Warnsignale in den Signalpfad der Hörhilfe einspeist, sobald der La dezustand der Gleichspannungsquelle einen Minimalpegel unterschreitet. Also advantageous is the arrangement of a warning system in the implantable part of the charging system feeds the warning signals in the signal path of the hearing aid as soon as the La dezustand the DC voltage source falls below a minimum level. Der Träger der Hörhilfe wird dadurch mittels akustischer Signale darauf aufmerksam gemacht, daß er die Gleichspannungsquelle seines Gerätes nachladen muß. The carrier of the hearing aid is thereby made aware by means of acoustic signals, that he has to recharge the DC voltage source of his device.

Der externe Teil des Ladesystems kann ortsfest und netzgebunden oder aber bevorzugt als portables Gerät mit nachladbaren Batterien ausgeführt sein. The external part of the charging system may be stationary and grid-based or preferably carried out as a portable device with rechargeable batteries.

Bevorzugte Ausführungsbeispiele der Erfindung sind nachstehend unter Bezugnahme auf die Zeichnungen näher erläutert. Preferred embodiments of the invention are explained in detail below with reference to the drawings. Es zeigt It shows

Fig. 1 einen Schaltplan eines Ladesystems mit transkutaner Energieübertra gung, Fig. 1 supply a circuit diagram of a charging system with transcutaneous Energieübertra,

Fig. 2 einen schematischen Schnitt durch ein Ladesystem zur transkutanen Energieübertragung, Fig. 2 is a schematic sectional view of a charging system for transcutaneous energy transfer,

Fig. 3 einen schematischen Schnitt durch eine Empfangs- und Sendespule zur perkutanen Energieübertragung, Fig. 3 shows a schematic section through a receiving and transmitting coil for percutaneous energy transmission,

Fig. 4 eine schematische Darstellung einer Kopplung zwischen einem La desystem und einer Hörhilfe. Fig. 4 is a schematic representation of a coupling between a La desystem and a hearing aid.

Das in Fig. 1 dargestellte Ladesystem besteht aus einem implantierten Empfangsteil 10 und einem externen Sendeteil 11 . The charging system shown in Fig. 1 consists of an implanted receiving part 10 and an external transmitting part 11. Der Empfangsteil 10 ist gemeinsam mit einer Hörhilfe 12 in einem Gehäuse 13 untergebracht, das unter der Haut 14 im Körper angeordnet ist. The receiving portion 10 is housed together with a hearing aid 12 in a housing 13 which is placed under the skin 14 in the body. Der Empfangsteil 10 weist eine Empfangsspule 15 auf, die zusammen mit einem Kon densator 16 einen Serienresonanzkreis bildet, der durch einen im Sendeteil 11 des La desystems befindlichen zweiten Serienresonanzkreis bestehend aus einer Sendespule 17 und einem Kondensator 18 mit gleicher Resonanzlage angeregt wird. The receiving part 10 comprises a receiving coil 15 which, together with a Kon capacitor 16, a series resonant circuit which is excited by a desystems located in the transmit portion 11 of the La second series resonant circuit consisting of a transmitting coil 17 and a capacitor 18 at the same resonance position. Die Empfangs spule 15 und der Kondensator 16 sind Teile eines Wechselstrom-Ladekreises 19 , der sich, wie in Fig. 1 dargestellt, über einen Schalter 20 und je nach Phase über Dioden 21 , 24 bzw. 22 , 23 und eine Gleichspannungsquelle 25 schließt. The receiving coil 15 and the capacitor 16 are parts of an AC charging circuit 19, which, as shown in Fig. 1, via a switch 20 and, depending on phase via diodes 21, 24 and 22, 23 and a DC voltage source 25 is closed. Eine Zenerdiode 26 schützt die Gleichspannungsquelle 25 und die nachfolgende Schaltung der Hörhilfe 12 vor zu hoher Spannung des Ladekreises 19 . A Zener diode 26 protects the DC voltage source 25 and the subsequent circuit of the hearing aid 12 from excessive voltage of the charging circuit 19th Die Höhe des in der Empfangsspule 15 induzierten Stromes ist von der Größe der im Ladekreis 19 liegenden ohmschen Widerstände, wie dem Wicklungswiderstand der Empfangsspule 15 , den differentiellen Widerständen der Dioden 21 bis 24 und dem Innenwiderstand der Gleichspannungsquelle 25 abhängig. The height of the voltage induced in the receiving coil 15 current is dependent on the size of the in-charging circuit 19 resistive resistors as the winding resistance of the receiving coil 15, the differential resistances of the diodes 21 to 24 and the internal resistance of the DC voltage source 25th Da der Innenwiderstand der Gleichspannungsquelle 25 im Vergleich zu den anderen Wi derständen vernachlässigbar klein ist, erfolgt eine Stromeinprägung auf die Gleichspan nungsquelle 25 . Since the internal resistance of the DC power source 25 as compared to the other resistors, Wi negligibly small, then a current injection on the DC clamping voltage source 25th Die Spannung der Gleichspannungsquelle 25 wird während des Ladens über einen Komparator 27 überwacht. The voltage of the DC voltage source 25 is monitored during charging via a comparator 27th Bei Erreichen eines festeingestellten Spannungs wertes wird mittels des Schalters 20 ein zusätzlicher Widerstand 28 in den Ladekreis 19 eingeschleift, der den Ladestrom begrenzt. Upon reaching a preset voltage value, an additional resistor is looped into the charging circuit 19 of the switch 28 by means 20 which limits the charging current.

Bei der in Fig. 1 veranschaulichten Ausführungsform ist ferner eine Warneinrichtung 44 vorgesehen, die in den Signalpfad der Hörhilfe 12 Warnsignale einspeist, sobald der La dezustand der Gleichspannungsquelle 25 einen vorgegebenen Minimalpegel unter schreitet. In the example illustrated in FIG. 1, a warning device 44 is further provided, which feeds 12 warning signals into the signal path of the hearing aid when the La dezustand the DC power source 25 a predetermined minimum level below. Zusätzlich oder statt dessen kann eine Telemetrieschaltung 45 vorgesehen sein, die Informationen über den Ladezustand der Gleichspannungsquelle 25 nach außen gibt. In addition, or instead, a telemetry circuit 45 may be provided, 25 are the information on the charging state of the DC voltage source to the outside.

Das Schnittbild nach Fig. 2 zeigt ebenfalls ein Ladesystem zur transkutanen Energie übertragung. The sectional view of FIG. 2 also shows a charging system for transcutaneous energy transfer. Im Gegensatz zu Fig. 1 ist hier jedoch der Empfangsteil 10 des Ladesy stems nicht in einem gemeinsamen Gehäuse mit der Hörhilfe, sondern in einem separa ten Gehäuse 36 untergebracht. In contrast to FIG. 1, however, the receiving part 10 of the Ladesy here is not stems in a common housing with the hearing aid, but in a separa th housing 36 housed. Das im Mastoid 29 implantierte Gehäuse 36 enthält die Empfangsspule 15 , eine Ladeelektronik 30 , welche beispielsweise die Komponenten 20 bis 24 und 26 bis 28 der Fig. 1 einschließt, sowie die Gleichspannungsquelle 25 . The implanted in the mastoid 29 housing 36 contains the receiving coil 15, a charging circuitry 30, which includes, for example, components 20 to 24 and 26 to 28 of Fig. 1, and the DC voltage source 25. Letztere ist über ein Verbindungskabel 31 mit der in Fig. 2 nicht dargestellten Hörhilfe verbun den. The latter is connected via a connection cable 31 with the verbun not shown in Fig. 2 the hearing aid. Dadurch können die Hörhilfe im Ohr selbst und die implantierbare Energieversor gungseinheit der Hörhilfe an einer besser zugänglichen Stelle, beispielsweise in einer Ausnehmung des Mastoids hinter dem Ohr, angeordnet werden. This allows the hearing aid in the ear itself, and the implantable Energieversor supply unit of the hearing aid in a more accessible location, for example in a recess of the mastoid behind the ear, are arranged. Zum Laden der Gleichspannungsquelle 25 wird außerhalb der Haut 14 die Sendespule 17 mit der Empfangsspule konzentrisch in Deckung gebracht. For charging the DC power source 25 outside the skin 14, the transmit coil 17 is brought concentrically with the receiving coil cover. Zur Kontrolle der relativen Lage der als Primärspule wirkenden Sendespule 17 zu der die Sekundärspule bildenden Empfangsspule 15 kann der Ladeelektronik 30 eine Telemetrieschaltung 38 zugeordnet sein, die ein für die gegenseitige Ausrichtung der Spulen 15,17 kennzeichnendes Signal nach außen liefert. To control the relative position of the acting as the primary coil transmitter coil 17 to the secondary coil forming receiving coil 15 of the charging electronic a telemetry circuit may be associated with 38 30, which provides a signal indicative of the mutual alignment of the coils 15,17 signal to the outside.

Fig. 3 zeigt eine der Fig. 2 entsprechende Schnittdarstellung für die perkutane Energie übertragung. Fig. 3 shows one of the Fig. 2 corresponding sectional view for percutaneous energy transmission. Die Empfangsspule 15 ist unter der Haut 14 im Mastoid 29 implantiert. The receiving coil 15 is implanted under the skin 14 in the mastoid 29th Die Spule 15 weist einen Ferritkern 32 auf, dessen über die Spule 15 überstehendes Ende durch die Haut 14 hindurch nach außen geführt ist, wobei die Empfangsspule 15 und der Ferritkern 32 von biokompatiblem Material 33 vollständig umschlossen sind. The coil 15 has a ferrite core 32, whose protruding end 15 via the coil is guided through the skin 14 through to the outside, wherein the receiving coil 15 and the ferrite core is completely enclosed by a biocompatible material 33 32nd Zum Laden der Gleichspannungsquelle einer Hörhilfe, die über Zuleitungen 35 mit der Empfangsspule 15 verbunden ist, wird von außen über das äußere Ende 34 des Ferrit kerns 32 die Sendespule 17 geschoben. To charge the DC voltage source of a hearing aid, which is connected via leads 35 to the receiving coil 15 is pushed from outside through the outer end 34 of the ferrite core 32, the transmitting coil 17th Der Ferritkern 32 dient damit sowohl der me chanischen Fixierung der Sendespule 17 als auch der magnetischen Kopplung der bei den Spulen 15 und 17 . The ferrite core 32 thus serves both the me chanical fixation of the transmitter coil 17 and the magnetic coupling of the coils in the 15 and 17th Eine solche perkutane Energieübertragung ist wirkungsvoller als die transkutane Übertragung. Such percutaneous energy transfer is more effective than the transcutaneous transmission. Das über die Haut vorstehende Ferritkernende 34 kann klein und unauffällig ausgebildet und an versteckter Stelle, insbesondere hinter der Ohrmuschel, angeordnet sein. The protruding through the skin Ferritkernende 34 may be small and unobtrusive formed and arranged in a hidden place, particularly behind the auricle.

In Fig. 4 ist das separate Gehäuse 36 für die Energieversorgung der in einem getrennten Gehäuse 37 angeordneten Hörhilfe 12 dargestellt. In FIG. 4 the separate housing 36 is shown for the energy supply of which is arranged in a separate housing 37 hearing aid 12th Zu der Energieversorgung gehören der die Empfangsspule 15 aufweisende Serienresonanzkreis, die Gleichspannungsquelle 25 und ein Oszillator 39 . To the power supply part of the receiver coil 15 having a series resonant circuit, the DC voltage source 25 and an oscillator. 39 Als Gleichspannungsquelle 25 für eine Hörhilfe kommen ins besondere Nickel-Cadmium-Akkumulatoren in Knopfzellenbauweise in Frage, die je doch nur eine durchschnittliche Lebensdauer von fünf Jahren erreichen und dann er setzt werden müssen. When a DC voltage source 25 for a hearing aid are in particular nickel-cadmium batteries in button cell design in question ever but only achieve an average life of five years and then he continues to be. Dies macht eine auftrennbare elektrische Verbindung zwischen dem Batteriegehäuse 36 und dem Gehäuse 37 der Hörhilfe 12 wünschenswert, um nicht das gesamte System austauschen zu müssen. This makes a disconnectable electrical connection between the battery case 36 and the housing 37 of the hearing aid 12 desirable to avoid having to replace the entire system. Die in Fig. 4 beispielhaft gezeigte Verbin dung besteht aus zwei Koppelspulen 40 und 41 sowie einem Ferritstab 42 ; . The Verbin dung example shown in Figure 4 consists of two coupling coils 40 and 41 and a ferrite rod 42; sie stellt eine für die Energieübertragung durch Resonanzkopplung geeignete, lösbare Verbindung dar. it is a suitable for energy transfer by resonant coupling, releasable connection.

Die in der Gleichspannungsquelle 25 gespeicherte Energie wird mittels des Oszillators 39 in eine Wechselschwingung umgewandelt und in die als Sendespule wirkende Kop pelspule 40 gespeist. The energy stored in the DC voltage source 25 energy is converted by means of the oscillator 39 into an alternating oscillation in pelspule and acting as the transmitting coil 40 fed Kop. Die Koppelspule 40 ist Teil eines Serienschwingkreises, dessen Re sonanzfrequenz mit der Oszillatorfrequenz übereinstimmt. The coupling coil 40 is part of a series resonant circuit whose Re sonanzfrequenz coincides with the oscillator frequency. In die Mitte der Koppelspule 40 ist der Ferritstab 42 axial eingelassen. In the center of the coupling coil 40 of the ferrite bar 42 is axially embedded. Der Ferritstab 42 ragt etwa um die Spulen länge aus der Koppelspule 40 heraus. The ferrite bar 42 protrudes about the coil length from the coupling coil 40th Die als Empfangsspule wirkende Koppelspule 41 wird über diesen vorstehenden Teil des Ferritstabes 42 geschoben und so magnetisch und mechanisch mit der Sendeseite verbunden. Acting as a receiving coil coupling coil 41 is pushed and by the protruding part of the ferrite bar 42 is magnetically and mechanically connected to the transmission side. Die in der Koppelspule 41 induzierte Wechselspannung steht über einen in Fig. 4 nicht dargestellten Gleichrichter zum Be trieb der Hörhilfe 12 zur Verfügung. The voltage induced in the coupling coil 41 is alternating voltage of a not shown in Fig. 4 rectifier for loading of the hearing aid 12 drove available. Durch entsprechende Wahl des Windungszahlen verhältnisses der beiden Koppelspulen 40 , 41 kann für die Versorgung der Hörhilfe 12 eine höhere Spannung als die zur Verfügung stehende Batteriespannung erzeugt wer den. By appropriate selection of the numbers of turns of the two coupling coils ratio 40, 41 can be generated for the supply of the hearing aid 12 a voltage higher than the available battery voltage to who. Ein besonderer Vorteil der erläuterten Anordnung ist, daß es keine galvanische Verbindung zwischen der Gleichspannungsquelle und der Hörhilfe gibt, deren Kontakt flächen gegen das Eindringen von Körperflüssigkeit abgedichtet werden müssen. A particular advantage of the arrangement described, that there is no electrical connection between the DC voltage source and the hearing aid, the contact surfaces against the ingress of body fluid must be sealed. Beide Teile der Verbindung sind von einem biokompatiblen Material vollständig umschlossen und stellen zwei voneinander getrennte Systeme dar. Die Energieübertragung geschieht über die magnetische Kopplung, und sie wird durch das Abdichtungsmaterial nicht be hindert. Both parts of the connection are completely enclosed by a biocompatible material and provide two separate systems. The power transmission takes place via the magnetic coupling, and it will not prevent be by the sealing material.

Bei dem in dem Gehäuse 13 bzw. 37 untergebrachten Gerät 12 kann es sich statt um eine Hörhilfe auch um einen Tinnitus-Maskierer handeln. In the accommodated in the housing 13 and 37, device 12 may also be held by a tinnitus maskers to a hearing aid. Während vorstehend Se rienresonanzkreise vorgesehen sind, kann grundsätzlich auch mit Parallelresonanzkrei sen gearbeitet werden. While above Se series resonance circuits provided, can in principle also worked with Parallelresonanzkrei sen.

Claims (10)

1. Ladesystem für implantierbare Hörhilfen und Tinnitus-Maskierer mit einer mehr fach wiederaufladbaren Gleichspannungsquelle, gekennzeichnet durch einen im plantierbaren Empfangsresonanzkreis ( 15, 16 ) als Stromquelle für die zu ladende Gleichspannungsquelle ( 25 ) und einen außen am Körper anordbaren Sendereso nanzkreis ( 17, 18 ), der mit dem Empfangsresonanzkreis zur Energieübertragung vom Körperäußeren ins Körperinnere induktiv koppelbar ist. 1. Charging system for implantable hearing aids and tinnitus masker with a multi-rechargeable DC power source, characterized by a plantierbaren receiving resonant circuit (15, 16) as a power source for the to be loaded DC voltage source (25) and a arrangeable outside of the body Sendereso nanzkreis (17, 18 ) which is inductively coupled with the reception resonant circuit for energy transmission from the body exterior inside the body.
2. Ladesystem nach Anspruch 1, dadurch gekennzeichnet, daß die Sendespule ( 17 ) des Senderesonanzkreises ( 17, 18 ) zur Energieübertragung durch die geschlossene Haut (transkutan) vom Körperäußeren ins Körperinnere mit der Empfangsspule ( 15 ) des implantierbaren Empfangsresonanzkreises ( 15, 16 ) konzentrisch in Deckung bring bar ist. 2. The charging system of claim 1, characterized in that the transmitting coil (17) of the transmission resonant circuit (17, 18) for energy transmission through the closed skin (transcutaneous) from the body exterior to the interior of the body to the receiving coil (15) of the implantable receiving resonant circuit (15, 16) concentric bring in cover bar.
3. Ladesystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der implantier bare Teil des Ladesystems eine Telemetrieschaltung ( 38, 45 ) zur Gewinnung von Information über die relative Position der Sendespule ( 17 ) zur Empfangsspule ( 15 ) und/oder über den Ladezustand der Gleichspannungsquelle ( 25 ) aufweist. 3. The charging system of claim 1 or 2, characterized in that the implantier bare part of the charging system, a telemetry circuit (38, 45) for obtaining information about the relative position of the transmitting coil (17) to the receiving coil (15) and / or the charge state comprising the DC voltage source (25).
4. Ladesystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Empfangsspule ( 15 ) einen über die Spule überstehenden Ferritkern ( 32 ) aufweist, dessen überstehendes Ende zur magnetischen und mechanischen Kopp lung mit einer Sendespule ( 17 ) durch die Haut ( 14 ) nach außen hindurchführbar ist. Having 4. charging system according to any one of the preceding claims, characterized in that the receiving coil (15) has a projecting beyond the coil core (32) having a protruding end for the magnetic and mechanical couplers lung with a transmitting coil (17) through the skin (14) can be guided to the outside.
5. Ladesystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Empfangsresonanzkreis ( 15, 16 ), eine Ladeelektronik ( 30 ) sowie die Gleichspannungsquelle ( 25 ) zusammen mit der Hörhilfe ( 12 ) oder dem Tinnitus- Maskierer in einem gemeinsamen Gehäuse ( 13 ) untergebracht sind. 5. The charging system of any of the preceding claims, characterized in that the receiving resonant circuit (15, 16), an electrical charging system (30) and the DC voltage source (25) together with the hearing aid (12) or tinnitus masker in a common housing (13 ) are housed.
6. Ladesystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Gleichspannungsquelle ( 25 ), gegebenenfalls in Kombination mit dem Empfangsre sonanzkreis ( 15, 16 ) und der Ladeelektronik ( 30 ), in einem separaten Gehäuse ( 36 ) untergebracht ist und mit der Hörhilfe ( 12 ) bzw. dem Tinnitus-Maskierer lösbar galvanisch verbunden ist. 6. The charging system of any one of claims 1 to 4, characterized in that the DC voltage source (25) being optionally housed in combination with the Empfangsre sonanzkreis (15, 16) and the charging electronics (30) in a separate housing (36) and with the hearing aid (12) or tinnitus masker is detachably electrically connected.
7. Ladesystem nach Anspruch 6, dadurch gekennzeichnet, daß die implantierbare Energieversorgung mit der Hörhilfe ( 12 ) bzw. dem Tinnitus-Maskierer lösbar, gal vanisch getrennt und induktiv verbunden ist. 7. The charging system of claim 6, characterized in that the implantable energy supply of the hearing aid (12) or tinnitus masker releasably gal is vanisch separated and inductively coupled.
8. Ladesystem nach Anspruch 7, dadurch gekennzeichnet, daß zur induktiven Kopp lung zwei Koppelspulen ( 40, 41 ) vorgesehen sind, deren Übersetzungsverhältnis so gewählt ist, daß die Betriebsspannung für die Hörhilfe ( 12 ) bzw. den Tinnitus-Mas kierer die Spannung der Gleichspannungsquelle ( 25 ) übersteigt. 8. The charging system of claim 7, characterized in that for inductive couplers lung two coupling coils (40, 41) are provided, the transmission ratio is selected such that the operating voltage for the hearing aid (12) or tinnitus-Mas Kierer the voltage of the DC voltage source (25) exceeds.
9. Ladesystem nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß das Gehäuse ( 36 ) der Energieversorgung zur Implantation im Kopfbereich, vorzugs weise im Mastoid ( 29 ), ausgelegt ist. 9. The charging system of any one of claims 6 to 8, characterized in that the housing (36) of the power supply for implantation in the head region, preferably, in the mastoid (29), is designed.
10. Ladesystem nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der implantierbare Teil des Ladesystems eine Warneinrichtung ( 44 ) aufweist, die Warnsignale in den Signalpfad der Hörhilfe ( 12 ) einspeist, sobald der Ladezustand der Gleichspannungsquelle ( 25 ) einen Minimalpegel unterschreitet. 10. The charging system of any one of claims 1 to 9, characterized in that the implantable part of the charging system has a warning device (44) feeds the warning signals into the signal path of the hearing aid (12) as soon as the charging state of the DC voltage source (25) falls below a minimum level ,
DE4104359A 1991-02-13 1991-02-13 Expired - Lifetime DE4104359C2 (en)

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DK92102207.5T DK0499939T3 (en) 1991-02-13 1992-02-10 Charging system for implantable hearing aids and tinnitus mask center
EP92102207A EP0499939B1 (en) 1991-02-13 1992-02-10 Charging system for implantable hearing aids and Tinnitus masks
DE59200351A DE59200351D1 (en) 1991-02-13 1992-02-10 Charging system for implantable hearing aids and tinnitus maskers.
US07/834,838 US5279292A (en) 1991-02-13 1992-02-13 Charging system for implantable hearing aids and tinnitus maskers

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US5279292A (en) 1994-01-18

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